Stone-working machine



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VR. D. FIELD au E. o. PRATT. STONE WORKING MACHINE.

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(No Model.)

STONE `Wlint?MAGHKINLI.

Patented Apr. 3, 1894.'

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STONE WORKING MACHINE. I

Patented Apr. 3, 1894.

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UNITED STATES PATENT OEEICE.

ROLLIN D. FIELD AND EUGENE O. PRATT, OF RUTLAND, VERMONT.

STONE-WORKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 517,742, dated April 3, 1894. Appllcationiiled April 20, 1893. Serial No. 471,181. (No model.)y

1 useful improvements in stone working machines, designed primarily forl planing or y Working'or forming moldings or analogous de- .tion will hereinafter appear and the novel e ss.

signs upon the stone, upon greater or less arcs, and it has for its obJects among others to provide animproved machine in whlch provision is. made for the easy and ready adjustment of the parts for operation upon stonesof varying'sizes and upon varying arcs.

It has for a further object to provide improved belt-shifting devices operating in conjunction with and by devices on the movable table. The belt-shifting devices are so arranged that the belts are shippedone in advance of the other so that the one will leave the tight pulley beforethe other beltgoes on. This is accomplished by the peculiar construction andarrangementof thecams by which the belt-shipper is actuated.

Other obj ects and advantages of the invenfeatures thereof will be specifically defined by the appended claims.

The invention is` clearly illustrated in the accompanying drawings, which, with the letters of reference markedthereon, form a partof this specification, and in which- Figure lis an end view of our'improved stone planing machine. Fig. 2 is a section on the line 2.-2 of Fig. 3 looking down. withthe platen and other parts removed.` Fig. 3 is an elevation with parts in section.V Fig. 4 is a bottom plan of the yplaten removed. Fig. 5 is a top plan of the same with a stone shown in position thereon. Fig. 6 is a detail in plan of `one form of clamp for-holding the stone on .the platen. Fig. 7 is a detail kin side elevation showing the gage for setting the stone to different circlesor arcs on the platen. Fig. 8 is a, plan of the shipping dogs. Fig..9 is a` side elevation of one of the clamping dogs. Fig.

10 is a plan of shipping dogs carried by the shipping lever and designed to be actuated by a pin on the platen. Fig. l0a is a detail showing one of the dogs and the co-'operating pin of the shipping lever.

Like letters of reference indicate like parts throughout the several views inwhich they appear.v v

Referring now to the details/of the drawings by letter, A designates a suitable base or support, from which risefthe uprights A.

A2 is a horizontal shaft suitably journaled designed to receive its motion from any suitable source, not shown, and onvwhich shaft are the pulleys A3 and A4 as seen in Fig. l.

Supported upon the base is the substantially semi -circular bed B which is practically hollow as shown to provide space for other parts as will soon appear. This bed has upon the upper face of its curved portion a substantially V-shaped groove b as seen best in Fig. 3 in which travels asubstantially V-shaped depending rib c from the under side of the platen. At the center of the straight side of the bed there is formed a boss B', through which passes the vertical center pin B2 held by the clamp B3 which is provided with adjusting screws b on the boss B and carrying at its upper end a boss B? over which is designed to t so as to .readily revolve thereon the collar ci'of the platen C. This platen vis segmental in shape as seen in Figs.

, 4 and 5 and this collar is formed at the point representing the center from which the arc is taken and 'is provided with an adjustable semi-circular box or bearing c2 as seen best in Fig. 4, set screws c3 being providedv for permitting the necessary adjustment as is also shown in said Fig. 4. The center pin B2 is screw threaded at its lower end and is there provided with'a nut c4 as shown.

Upon the under side of the .platen near itsouter edge is the depending substantially V- shaped rib o which rides inthe channel or groove b of the bed B as seen in Figs; 1 and 3, and C is arack followingthe curve of the platen and arranged inside, the said rib, that This rack may be integral with the platen as seen in Fig. 3, as may also the rib c, or either or both may be made separate therefrom, and

is, nearer the center as seen in Figs. 1 and 3;

secured thereto in any suitable manner; the rib and rack may be integral with each other if desired, as seen in Fig. 1. Near its outer edge upon the under side the platen is provided with a fiange C2 as seen in Figs. l, 3 and 4 which may be L-shaped or T-shaped as shown, it being designed to support the shipper dogs which are adjustable thereon. These dogs may assume any desired form, some of which are shown. As seen in Fig. l the dog D consists of asuitable casting having a groove to conform to the shape of the flange and held in its adjusted position by a set screwd or any other suitable means. There are to be two of these dogs on the platen, one near one end of the curved side and the other near the other end; they are made adjustable to change the time of shifting of the belts in accordance with the shape and size of the stone being operated upon. These dogs have a camshaped portion as seen at d in Fig. 10 which is designed to engage a pin d2 on the shipping lever as seen in Fig. 3 to move the latter and through the mechanism hereinafter described shift the belts. The upper face of the platen is provided with a plurality of radial slots or grooves C3 as seen in Fig. 5 for the reception of the clamps which are employed `for holding the stone on the same. These clamps may be of any well known or preferred form. As seen in Fig. 6 the clam p consists of the angular portion E adapted to engage the cornerof the stone and is provided with set screws eforengaging the stone which is represented by EX and with the horizontal arms E which are slotted as seen at e through which slots pass suitable means into the grooves for adj ustably yet rigidlyholdin g the clamp in place and the stone in position. Another form is shown in Fig. 9 in which the shank E2 is held in the groove of the platen and the hook or dog E3 is made adjustable thereon vertically by a nut c2 to enable it to engage the top of the stone as seen in said Fie. 9.

is a shaft parallel with the shaft A2 and suitably journaled on a lower plane as shown, having a bearing at one end in a standard F suitably supported, and on this shaft are the loose pulleys F2 and F2 and the intermediate fast pulley F4.

G is a shaft suitably journaled in a plane parallel with the shaft F and having uponits outer end a bevel pinion G designed to mesh with the rack C upon the under side of the platen as seen in Figs. l and 3. Motion may be conveyed from the shaft F to the shaft G 'and the bevel pinion in anysnitable manner. In Figs. 2 and 3 we have shown one form of gearing for this purpose; it consists of a small gear g on the outer end of the shaft F which mesheswith a larger gear g on a shaft g2 y which carries a small pinion or gear g3 which meshes with the gear gL1 on the shaft Gthereby giving motion to said shaft andto the bevel pinion thereon.

It now remains only to describe the devices for actuating the belt shifter, and the shifter mechanism itself. It comprises ashipper lever II working through a slot or opening hin the curved side of the bed as seen in Figs. 2 and 3, and at its inner end secured to a vertical shaft H mounted to revolve in suitable bearings within the space inclosed by the bed, and carrying at its lower end a segmental plate H2 which is provided upon its under face with bevel gear teeth as seen in Fig. 3 which are designed to mesh with a bevel pinion I carried by the horizontal shaftI, which is journaled in suitable bearings and at its other endis connected by swiveljoint or connection t with one end of the inclined rod or bar I2 the other end of which is similarly connected by swivel joint or connection t" with the horizontal shaft J mounted in suitable bearingsj as seen best in Fig. 3 and fast on this shaft are the collars K provided with the cam grooves 7c as seen best in Figs. 2 and 3, the cam grooves of the two collars being so arranged relatively to each other as seen in Fig. 3 that one is enough ahead of the other to cause the one belt to leave the fast pulley before the other belt moves on to it.

L and L are the belts, one a straight and the other a crossed belt as seen in Fig. l; they pass over the pulleys A3' and Ai as seen in Fig. l and over the pulleys on the shaft F as shown.

M is a leverl pivoted at m on an uprightm and carrying at its lower enda roller m2 adapted to travel in the spiral groove of one of the IOO collars and at the other end provided with a loop or analogous device m2 to receive one of the belts as seen best in Fig. l.

M is another lever arranged horizontally and pivoted at 'm4, having at one end a roller m5 adapted to travel in the groove of the other collar as seen in Figs. l, 2 and 3 and its other end provided with j an upwardly-extending arm M2 having a loop or analogous provision m to receive the other belt as shown in Figs. I, 2 and 3.

Instead of having the cams on the platen and a pin on the lever to be engaged thereby as seen in Figs. 2 and 3 in which mx designates the pin on the lever, we may reverse the arrangement, having the pin on the platen and the cams on the shipping lever as seen in Fig. IO wherein the cams are designated by the letter N, being fast upon the lever in such a position as to be engaged by the pin N which is supposed to be depending from the underside of the platen and operating upon one cam as the platen moves in one direction, and upon the other cam as the platen moves in the opposite direction. Or, the cams may be ot' the shape seen in Fig.j8.` Or,

we may arrange the shipping lever outside `the bed as shown by dotted lines in Fig. 2, in which case it will be in the form of a two-V armed lever O mounted on the verticalshaft or pin o which carries at its'lower end the segmental gear O designed to mesh with the 4bevel gear I on the shaft I and to be actu- IIO ated by a pin on the platen. The shaft I will of necessity be made somewhat longer than Where the shipping lever is arranged inside the bed.

P is a cross head secured to the upper ends of the uprights A as seen` in Fig. 3, and mounted in suitable bearings p on this crosshead or cap is the horizontal shaft P provided with a suitable handle P2 by which it may be turned when desired to raise or lower the frame carrying the tool or tools. This shaft carries the oppositely disposed bevel gears Q and Q as'seen in Fig. 3, which mesh with the bevel gears R and R on the screw. shafts R2 and R3 which are mounted in the tool-carrier frame S which is designed to be moved vertically upon the uprights A by the turning of the shaft P as will be readily understood. On this frame is mounted the tool-carrier T which is adaptedr to be moved horizontally thereon by the screw T which is extended at one end-and provided with a `crank'handlet by which the screw may be turned to move the carrier in either direction desired. In the carrierTis vertically adjustably mounted a slideUwhich is rendered adjustable by means of a screw rod t with a hand wheel t2 as seen best in Fig. 3, the slide being movable in guides Ta on the carrier T as shownl in said Fig. 3 and also in Fig. 1. On this slide U is pivotally supported on a verticalipivot u a plate V upon which is held upon.

the tool or'cutter W in any suitable manner, being adjustable by means of set screws c as seen in Figs. l and By this means the tool can be adjusted to suit the character of work or the size of the stone being operated Other means may be provided for holding the tool or cutter.

X, Fig.'7, represents a gage designed for removable placement onthe platen for setting the stone to different circles on the platen. It is provided with a centering pin or projection fr, for setting the same and with a clamp or dog X for engaging. the stone to hold the same as will be understood from Fig. 7.

y The operation will be readily understood,

and is substantially as follows: lThe stone is placed upon the platen and thereheld in any of the suitable ways; the tool is adj usted in its support or holder and motion is imparted to the shaft-F through the medium of the belts, and this, through the medium ofthe compound-gearing, will impart motion to the bevel pinion G which meshing with the rack upon the lunder side of the platen will cause the same to move in the onel direction or the other until the belts are shiftedjby the shipper lever and the means on the platen engaging the same,whe1 the belts are automatically shifted' and themotion yof the platen reversed.

The tool is adj usted according to the character of the work to be done. f

Modifications iin detail may be resortedto without departing from the spirit of the invention or sacrificing any of its advantages. The bed may assume other shape than semicircular; it may be a greater or less segment. What we claim as new is l. The combination with a platen providedwith radial slots, of a clamp having an angular body portion and provided with slotted arms extending in different directions from different sides thereof, substantially as specied.

2. The combination with a platen provided with radial slots, of a clamp having an angular body portion with integrally slottedarms extending in diderent directions 'from different sides thereof and set screws passed through the body portion upon different sides and extended at right angles to said slots, substantially as specified.

3. The combination with a platen and platen operating means, and a belt-shifting mechanism, of a shipper lever provided with a segmental gear for actuating the belt-shifting mechanism, the shaft with its cam grooves, the inclined rod having swivel connection with said shaft and with the shaft of the gear meshing with the segmental gear and cooperating cam and cam-actuating devices interposed between said lever and platen, substantially as specified. y l f 4. The ycombination with the belt-pulleys and the belts,` of the shaft with its spiral cams, arranged so that the belt will be removed from one pulley before the other belt is moved thereon, the levers with their rollers working in the grooves of the cams, and carrying belt-engaging devices, theadjustable work holding clamps the platen and intermediate mechanisms for actuating said levers bythe .movement of the platen, substantially as specified. j v

5. The ycombination-with the shipping lever, of a vertical shaft to which it is secured,

a segmental gear carried by said shaft, beltvices are automatically actuated by the movement of the platen, substantiallyas specified.

' In testimony whereof we affix our signatures in presence of 'two witnesses.

. EUGENE O. PRATT. Witnesses: Y

JOHN B. MOORE,

. EDMonD G. MASON.

, ROLLIN D. FIELD.

IIOA 

